Valkyrie by Kate O'Hearn - Freya is turning 14. It's the end of her childhood. Now she is a full Valkyrie - a collector of souls from humanity's battlefields. But Freya doesn't want to follow in the footsteps of legends. She wants to understand what it is to be human: to make friends and laugh, to touch without causing death. Then, on her first mission, Freya reaps the soul of a soldier with unfinished business. He sends her to the human world on a deadly quest.